When politicial correctness reaches a Ww2 game. In reality Blacks were heavily discriminated in the American society and army. (Some exclusions like the Red tails but even that screams for racism because puttIng a unit together just on Skin color?)
Are osttruppen properly Modelled with east/slavic faces?
What you are seeing is the product of segregation, a subset of discrimination. In that sense units like the Tuskeegee airmen is part of the same, not an exception.
African Americans were drafted like everyone else, and many enlisted, like everyone else. But they filled more than their share of the support personnel like transportation and grave digging. But some combat units were formed like the 333rd Field Artillery Battalion that served with the 101st at Bastogne, the 332nd Fighter Group (the Red Tails), and the 78th, 758th and 761st Tank Battalions.
The combat units I think shared an interesting history. They were often put together for political reasons ("we have to have some black units to help keep the black population patriotic and pro-war effort, etc. etc.") but held out of combat longer than white units because there were suspicions of their ability to fight. But they often consisted of a higher caliber, on average, of men than the regulear white combat units. These combat units were rarer, and white soldiers could volunteer for the Airborne, Rangers, Mountain, etc. And the units were often held back from combat until well after they were formed they had years of training. When combat losses made the need for trained and equipped units a priority and they were finally sent into combat they performed very well.